1
The covalent bond
Two non-metals do not hand electrons over: they share them. A covalent bond is a bonding pair, i.e. electrons shared between two atoms, each usually supplying one.
High school10 min
Covalent bonding and Lewis structures
Build a Lewis structure without guesswork: count the valence electrons, place the pairs, switch to multiple bonds and check with formal charge.
The essentials
2
Octet and duet
Members only
3
Bonding pairs and lone pairs
Members only
4
Single, double and triple bonds
Members only
5
Formal charge and resonance
Members only